Insectproof screen means for windows or doors



1932- c JOHNSTON INSECTPROOF SCREEN MEANS FOR WINDOWS OR DOORS Filed Oct. 22, 1931 2 Sheets-Sheet 1 Leslie Chox lesJ ohnsi'o'rz V E N TO R; \M

M Attorney.

Patented Nov. 15, 1932 UNITEDISTATES PATENT "o FicE LESLI [E CHARLES aonnsroiv, or SYDNEY, NEwsoU'rH WALES, nos rnamn msno'rrnoor SCREEN MEANS'FOR wnvnows on noons Application filed October 22, 1931, Serial No. 570,324, and in Australia October 27, 1930. I

This invention relates to insect-proof screen means for windows or doors, and the object of the invention is to provide cheap, simple and effective means, whereby when a window or door is open insects such as flies or Otherwise can not gain access to the interior of the enclosure through the window or door opening with which the said means are associated. The invention is applicable either to sliding or to casement windows. f

Fig. 1 is a perspective view of a window frame fitted with the screen means; Fig. 2 is a sectional elevation; Fig. 3'is an enlarged sectional detail; Fig. 4 is an enlarged detailed perspective view; Fig. 5 is an enlarged sectional plan on plane 5-5, Fig. 4; Fig. 6 is an elevation view of one of the vertical cambered members; Figs. 7 and 8 are sectional plans on lines 77 and 8-8, Fig. 6; Fig. 9

is a perspective view of a part of a screen framing of modified construction; Fig. 10 is an enlarged sectional view similar to Fig. 5,

7 but showing a modified construction; Fig. 11 is a perspective view of a doorway fitted with a screen; and Fig. 12 is a sectional elevation thereof.

Referring to Figs. 1 to 8, a framing is provided which is preferably constructed of wood; said framing consists of a pair of vertically disposed cambered members 2 and a top horizontally disposed member 8. The member 3 carries a plurality of coil springs 4. To each of the springs 4 is fixed a horizontally disposed bar 5 to which is attached one end of a sheet of gauze or like screen netting 6;

the other end of the sheet 6 is connected to a roller 7. The screen 6 is extended between the cambered members 2, and its lateral sides are adapted to run on the cambered portions 9 of the members 2 when the roller 7 is moved upwardly or downwardly. 7

Each end of the roller 7 is provided with a fixed stub spindle 10, and each of said spindles is furnished with a bearing bracket 11, as well as with a spur pinion 12 fixed to with the cambered rack bars-16which are secured to the cambered members 2-Within recesses 17 therein. Each oftherecesses 17 V are slightly deepened on one side of each of the rack bars 16'whereby a vertical cambered 55. groove or raceway 18 will be formed in said recesses. Within each of the raceways 18 is adapted to slide a flanged portion 19located on each. of the bearing brackets 11, whereby the spur pinions 12 are maintained incontact with the rackbars 16, and the gauze sheeting 6 is simultaneously firmly held in contact. with the 'cambered faces 9 ofthe members- 2.

. Said cambered faces 9 are disposed slight-, 1y out of alignment with the cambered rack bars 16 at the upper ends of the cambered members 2 for the purpose of accommodating the roller 7. and thereby to maintain the gauze sheet 6 in'close contact with the said cambered faces 9 (see Figs.'6, 7 and 8). I

Although the screen has been shown as applied to a window it may also be applied to a door in a similar manner.

In operation, upon the:framing consistmg of the members 2 and 3 having. been 75, mounted on a window or door'frame,.the gauze or like'screen 6 can be readilyraised or lowered on the camberedportions of said framing about the window orv door opening to allow full admission of air toan enclosure without entrance thereto of flies .or other insects; in such operation, the spur pinions 12 engage with therac-k bars16 .andthespring tension means 4 associated with the,

bar 3 enablesthe gauze or like screen 6 to be evenly rolled onto or unrolled from the roller 7 without leaving anyspace between such screen 6 and the cambered faces 9-01? the members 2. If flies are not to be admitted through the window or dooropening it will be understood that. the. screen sheeting 6 must always cover the window or door opening evenlthough the window or door or part thereof maybe open.

Referring'to Figs. 9. and 10, wherein the top bar5 is shown rigidlysecured to the top member 24, in such construction'the' spring tensional means are directly associated with the roller 7 (see Fig. 10). The spindle'20 is loosely mounted in the roller 7and the 1m With reference to Figs. 11 and 12 wherein the screen means are shown as. applied to a doorway, it will be understood that such con struction of the screen may also be utilized on a window framing. v

In such embodiment of the invention the construction of roller 7 with spindle 20 and appurtenant parts as shown in Fig. 10 are preferably used. To one of the verticalmembers 25 of the doorway is secured the bar 5 to which one end of the'screen 6 is attached. The spur pinions 12 of the roller 7 mesh with horizontally disposed rack bars 16 which are aflixed to the horizontally disposed cambered members 2. The upper cambered member 2 is fastened to the top cross member 26 of the doorway while the bottom member 2 may be secured to the flooring 27. Otherwise the cambered members 2 are constructed in similar manner to that shown in Fig. 2,.

and the operation of the said screen means are similar to that before described. 7

What I claim as my invention and desire to secure by Letters Patent is 1. Insect proof screen means for windows or doors comprising a framing associable with a window or door and which includes recessed cambered means carrying cambered rack bars within the recessed portion of said cambered means, a roller to which one end of the screen sheeting is attached, means-associated with the window or door to which theother end of the screen sheeting is attached, a spur pinion on each end of the roller adapted' to mesh with the said rack bars, and spring tensioning means for said screen sheeting.

2. Insect proof screen means according to claim 1, in which tensioning means for the screen sheeting consist of a series of coil springs which are interposed between the screen sheeting and the means to which said other end of the screen sheeting is attached.

3. Insect proof screen means according to the preceding claim 1, in which the, roller for the screen has associated therewith at opposite ends, stub axles for the spur pinions and recessed flanged bearings therefor, and

the recesses in the cambered parts of the framing are deepened on one side to allow the flanged portions of the said bearings to slide in saidrecesses to enable the spur pinions to be kept in contact with the cambered rack bars.

4. Insect proof screen means according to the preceding claim 1, in which the rack bars are located in the recesses of the cambered means'of the framing and the cambered faces of the latter means are disposed slightly out of alignment with the rack bars for the purpose of accommodating the varying diameter of the screen sheeting roller as the said sheeting is wound on said roller.

In testimony whereof I aflix my signature.

LESLIE CHARLES, JOHNSTON.

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